The 3M CFS117-S is a drop-in replacement cartridge. This replacement cartridge is an economical way to reduce the particles in drinking water. The 3M CFS117-S is a granular activated carbon (GAC) filter that reduces unwanted taste/odors and chlorine corrosion of metallic components. In addition, it reduces scale build-up and equipment downtime. The 3M CFS117 is ideal for use in coffee and hot tea water filtration applications.